You need own pickture for plastic and it own item check my profile, i know what you mean but in my game i get all plastic material from zombie (same with rag)

the plastic is basic item for me to make plastic bottle and sealed container

Thank you, I'll try it soon!

Dunno if this topic is fully dead, but just a small suggestion (pls ignore if not applicable/aligned with your intention):
Try to skip the intermediate steps/items unless it has wider use (e.g. use for many other recipes). The reason is that for every "step" you will need additional workers to work on it, which will make it troublesome for people who prefers smaller communities to automate.

Pls note: the following variants are just examples, intended to illustrate what I mean by simplification (reducing number of require items and steps/workers). You will prob want to come up with your own versions.



Variant example 1:
For a simpler version, consider rewriting the recipes into single step primary->end product form: (if I am not wrong, you need to make sure that the products in one batch can fit into expected inventory space, or else only the strongest people with large backpacks can actually use it)
It also has the benefit of not requiring new items, which keeps it clean from the rest of the game.
The disadvantage is that for Recipe 1, it may use up all plastic bottles which is potentially undesirable (unless player using some other item as water container). Recipe 2 prob has no such problem.

Recipe 1: 1 plastic bottle + 1 wood + 2 flint + 2 string -> 25 arrows
Recipe 2: (N) boots (equal to 10 floz plastic/rubber?) + 2 wood + 2 flint + 2 string -> 25 arrows

Variant example 2:
This one assumes that bottles and boots to fletchings are never automated and manually created only. You only need to create the fletchings item. This version splits the process into 2 steps (via fletchings) to protect against accidental usage of potentially useful inputs like the plastic bottle

Recipe 1: 1 plastic bottle -> 25 arrow fletchings (unchanged)
Recipe 2: (N) boots + 1 wood ->50 arrow fletchings (merged)
Recipe 3: 25 Fletchings, 1 Wood, 2 Flint, 2 string -> 25 arrows


Additional comments:

This is just my own subjective comments/suggestions:

I would prob take out string if using something similar to Variant 1, to skip one more step that requires a worker to be fully automated, which is prob undesirable, since string currently does not have a lot of use and rags cannot be automated iirc. While it IS possible to add a new cloth->rag recipe to say workbench to allow automation, it can be ... troublesome (if not careful, you may end up with a nudist community, unless that is your intention ;) )

Variant 2 avoided above problem simply because there are already many parts which are prob not going to be automated (Recipe 1/2). So rags is just going to be another manually prepared parts, in addition to fletchings.

sf, good comment, I'll think about it.